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Anonymous
The sum of 8/9 and 4/7 is 1 29/63.
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The sum of 4/9 and 1/9 is 5/9.
The sum of 4/9 and 3/4 is 1 7/36
4/9 is bigger than 3/7
The sum of 5/7 and 3/4 = 1 13/28
8/9 x 4/7 = 32/63